Wheel Bearings are most likely worn.
he he he
Stepping on the brakes of a moving car is an example of
Is stepping on the brakes of a car acceleration. That would be deceleration.
YES !
If you suspect something, get them checked. If you get vibration while applying the brakes, get them checked. If you get grinding noise from the brakes, get them checked.
Yes coasting downhill will save you fuel. However do not do this with a vehicle equipped with automatic transmission. You will damage the automatic transmission by coasting. You can do this with a manual transmission but do not shut the engine off. This would cause you to loose power steering and power brakes.
Finding a place to get car brakes checked should not present a problem. Sears, Pep Boys, Meineke, Firestone, Goodyear and Midas are all places where one can get their car brakes checked.
It is easy to replace the brakes if you know what you are doing. Even on cars like BMW's and Nissan's, the brakes are easily replaced.
It means it is time to have your brakes checked.
have your brakes checked
drum brakes
Have the brakes checked.